Device for cleansing the surface of rolls



Nov. 17, r 1 1,561,513

J. A. FROSSARD DEVICE FOP. CLEANSING THE SURFACE OF ROLLS Filed March 25, 1925 [7106 71 t0 7"" John A. fiossqjrd.

Patented Nov. 17, 1925.

PATENT OFFICE.

JOHN a. rnossann, or EAST PEPPEBELL, massncnusn'rrs V DEVICE FOR CLEANSING THE SURFACE OF ROLLS.

Application filed March 25, 1925. Serial No. 18,136.

To all whom it mag concern:

Be it known that I, JOHN A. FRossAno, a citizen of the United States, residing at East Pepperell, in the county of Middlesex and State of Massachusetts, have invented new and useful Improvements in Devices for Cleansing the Surfaces of Rolls, of which the following is a specification.

This invention relates to a device for cleansing the surfaces of rolls, and is particularly adapted to cleanse the surface of calender rolls such as are used in the manufacture of paper. The device may, however, be used for cleansing rolls used in different classes of machinery. It is very essential that rolls used in calendering paper should have a smooth and clean surface, and it is the object of this invention to keep the surface of calender rolls clean and smooth, and also still further to act as a means for separating from the surface of the roll the free end of a sheet of paper which is being calendered in the event that the sheet of paper should break and commence to be wound about the periphery of the calender roll.

In a device of the character set forth it is desirable that the same should be yielding so as to fit closely to the periphery of the roll throughout the entire length thereof,

80 and thus eliminate any particles that may have adhered to the surface of said roll, and also it is desirable that the same should be yielding in order that it may not injure or wear the roll to which it is applied.

The device of this invention pertains particularly to the manner in which the scraper blade of the device is held upon the supporting member and to the means whereby the scraper blade per se is detachably fastened to its support.

The invention consists in a device for cleansing the surfaces of rolls such 'as hereinafter described in the s ecification and particularly in the combination and arrange-' ment of parts set forth in the claims.

Referring to the drawings Figure 1 is a sectional elevation of a portion of a calender roll with my. improved device shown in section in connection therewith.

F 2 is a plan view of a scraper blade and t e members b which it is supported, the same being bro an away to save space.

Fig. 3 is a detail section taken on the line 33 of Fig. 2.

Like numerals refer to like parts throughout the several views of the drawings.

In the drawings, 5 and 5 are calender rolls, 6 a scraper blade preferably made of sheet spring steel, 7 is a bar in two parts 18 and 19 joined together by screws 12 and provided with a slot 8 in its front edge and in this 'slot the 'rear edge of the scraper is positioned. The scraper blade is detachably fastened to the bar 7 by a plurality of locking members, each consisting of a ball 9 which is positioned in a recess 10 in the part 18 of the bar 7, and these balls are each forced against the scraper blade 6 with a yielding pressure by flat plates 11 of spring metal which are fastened by the screws 12 to the bar 7 One corner 11 of each of these plates bears against a ball 9 and normally the balls project into the slot 8, but when the scraper blade 6 is forced into said slot, the balls are pressed backwardly into their recesses 10 against the pressure of their respective spring plates 11', and this holds the scraper blade firmly in position in the slot 8.

It is evident that the scraper blade can be withdrawn longitudinally thereof from the slot and inserted therein in like manner. The plates 11 constitute spring plates and are fastened together by a strip 13 at their rear ends. The strip 13 is fastened to a supporting member 14: by a clamp plate 20 and bolts 21 and said supporting member is adjustably supported upon the frame of the machine in any suitable manner, such for example, as the manner in which the angle iron 12 is adjustably supported upon the frame stardards 3 and i in the United States Letters Patent issued to me on April '8, 1919, No. 1,299,930, Scraper for paper calendering rolls or'the like.

The spring plates 11 allow the scraper blade and its supporting bar 7 to assume dilferent positions in order to accommodate variations in the surface of the calender roll which is being cleansed, that is, they yield sons to allow the scraper blade to tip slightly laterally or longitudinally thereof, and thus cause the edge of the scraper blade to always bear against the periphery of the calender roll throughout its entire lepgth, ,even though the surface of the roll may be slightly uneven or undulating longitudinally or circumferentially thereof.

I claim:

1. A device for cleansing the surface of a roll having, in combination, a bar provided with a slot along its front edge, a scraper blade with its rear edge positioned in said slot, and its front edge adapted to engage said roll, and yielding means on said bar projecting into said slot and engaging said scraper blade whereby the blade is detachably positioned and held in said slot.

2. A device for cleansing the surface of a roll having, in combination, a bar provided. with a slot along its front edge, a scraper blade with its rear edge positioned in said slot, and its front edge adapted to engage said roll, a locking member positioned in a rec tss in said bar and engaging said scraper blade, and yielding means on said bar engaging said locking member and forcing it against the scraper blade whereby the blade is detachably positioned and held in said slot.

3. A device for cleansing the surface of a roll having, in combination, a bar provided with a slot along its front edge, a scraper blade with its rear edge positioned in said slot, and its front edge adapted to engage said roll, a ball positioned in a recess in said bar and engaging said scraper blade, and yielding means on said bar engaging said ball and forcing it against the scraper blade whereby the blade is detachably positioned" and held in said slot. 4:. A device for cleansing the surface of a roll having, in combination, a bar provided with a slot along its front edge, a scraper blade with its rear edge positioned in said slot, and its front edge adapted to engage said roll, a ball positioned in a recess in said bar and engaging said scraper blade, and a flat spring on said bar engaging said ball and forcing it against the scraper blade whereby the blade is detachably positioned and held in said slot.

5. A device for cleansing the surface of a roll having, in combination, a bar provided with a slot along its front edge, a scraper blade with its rear edge positioned in said slot, and its front edge adapted to engage said roll, a plurality of balls positioned in recesses in said bar and engaging said scraper blade, a series of supporting spring plates fast to said bar and projecting rearwardly therefrom, a portion of said plates engaging the balls and forcing them against .the scraper blade whereby said blade is detachably positioned and held in said slot and a supporting member to which said supporting plates are fastened.

(3. A device for cleansing the surface of a roll having, in combination, a bar in two parts provided with a slot along its front edge, a scraper blade with its rear edge positioned in said slot and its front edge adapted to engage said roll, a plurality of balls ositioned in recesses provided in one o the parts of said bar and engaging said scraper blade, a series of supporting spring plates on said bar and projecting rearwardly therefrom, a portion of said plates engaging the balls and forcing them against the scraper blade, and means to fasten said plates and the parts of said bar together,

whereby said blade isdetachably positioned and held in said slot and a supporting member to which said supporting plates are fastened.

7. A device for cleansing the surface of a roll having, in combination, a bar in two parts provided with a slot along its front edge, means for fastening said two parts together, a scraper blade with its rear edge positioned in said slot and its front edge adapted to engage said roll, a ball positioned in a recess in the upper portionof said bar and engaging said scraper blade and yieldin means on said bar engaging said ball an forcing it against the scraper blade whereby the blade is detachably positioned and held in said slot.

In testimony whereof I have hereunto set my hand.

JOHN A. FROSSARD. 

